Finish converting most of the undeprecated api to jspecify

patches/api/0320-Bucketable-API.patch

@@ -6,20 +6,21 @@ Subject: [PATCH] Bucketable API
 
 diff --git a/src/main/java/io/papermc/paper/entity/Bucketable.java b/src/main/java/io/papermc/paper/entity/Bucketable.java
 new file mode 100644
-index 0000000000000000000000000000000000000000..84e360a16de956834a91142d45e4b5a0fe3d3a92
+index 0000000000000000000000000000000000000000..a63c3d0fe50f5808215ed169b81269112f76ec1b
 --- /dev/null
 +++ b/src/main/java/io/papermc/paper/entity/Bucketable.java
-@@ -0,0 +1,42 @@
+@@ -0,0 +1,41 @@
 +package io.papermc.paper.entity;
 +
 +import org.bukkit.Sound;
 +import org.bukkit.entity.Entity;
 +import org.bukkit.inventory.ItemStack;
-+import org.jetbrains.annotations.NotNull;
++import org.jspecify.annotations.NullMarked;
 +
 +/**
 + * Represents an entity that can be bucketed.
 + */
++@NullMarked
 +public interface Bucketable extends Entity {
 +
 +    /**
@@ -41,7 +42,6 @@ index 0000000000000000000000000000000000000000..84e360a16de956834a91142d45e4b5a0
 +     *
 +     * @return bucket form
 +     */
-+    @NotNull
 +    ItemStack getBaseBucketItem();
 +
 +    /**
@@ -49,7 +49,6 @@ index 0000000000000000000000000000000000000000..84e360a16de956834a91142d45e4b5a0
 +     * is picked up in a bucket.
 +     * @return bucket pickup sound
 +     */
-+    @NotNull
 +    Sound getPickupSound();
 +}
 diff --git a/src/main/java/org/bukkit/entity/Axolotl.java b/src/main/java/org/bukkit/entity/Axolotl.java